*hutch in intestinal wall into trophozoite
*trophozoite propagets in binary fission
*trophozoite does not invade human cells, just colonizeadhere to intestinal mucosa (villi)
**produces no bloody diarrhea
*trophozoite transforms into cyst under dry environment
*abrupt onset of diarrhea
*abd cramps
*no fatality case
===diagnosis===
**EIA - rapid diagnostic test
*fluorescence microscopy of feces
===treatment===
*metronidazole